Blast-furnace casting apparatus.



No. 636,885. Patented Nov. l4, I899.

F. E. BACHMAN.

BLAST FURNACE CASTING APPARATUS.

(Application filed Apr. 14, 1899.) (No Modem 2 Sheets-Sheet W/T/VESSES//V VE/VTOR ggwawz b, W g g w A TTOR/VEY.

Patented Nov. l4, I899. F. E. BACHMAN.

BLAST FURNACE CASTING APPARATUS.

(Application filed Apr. 14, 1899.) (No Model.) 2 Sheets-8heet 2.

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NlTE-D TATES BLAST-FU RNACE CASTlNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 636,885, dated November14, 1899.

Application filed April 14, 1899.

To all whom, it may concern.-

Be it known that I, FRANK E. BACHMAN, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, hawinvented certain new and useful Improvements in Blast-Furnace CastingApparatus, of which'the following is a specification.

My invention relates to an apparatus for casting metal, and specificallyto simplifying and improvingthe construction of the troughs utilized toconvey the metal from the furnace to the molds. Ileretofore the troughsemployed for this purpose were provided with permanentorint-egrally-formed dams and necessarily a certain proportion of themetal of each cast was wasted, as no passage was provided for the metalremaining in the trough during the latter portion of the cast whenreduced below the level of the dam. This invention is designed to affordmeans for saving and casting a larger percentage of metal thanheretofore by providing the trough with a. dam device that can bequickly and easily elevated or removed during the latter port-ion of thecast, and thereby provide a free passage for the metal remaining.

For a full understanding of the merits and advantages of the inventionreference is to be had to the accompanying drawings and the followingdescription.

The invention is susceptible to various changes in the form, proportion,and minor details of construction within the scope of the claims withoutdeparting from the principle or sacrificing any of the advantagesthereof, and to a full disclosure of the invention an adaptation thereofis shown in the accompanying drawings, in which- Figure 1 represents aplan view of a portion of a trough constructed in accordance with myinvention. Fig. 2 is a side elevation of the same. Fig. 3 is alongitudinal section on or about line a a, Fig. 1. Fig. 4 is a transverse section on or about line b b, Fig. 3. Fig. 5 is a detached view ofthe supplementary skimmer-gate. Fig. 6 is a perspective view of thesupplementary trough. Fig. 7 represents a longitudinal section through amodified construction.

In referring to the drawings in'detail like numerals designate likeparts.

The trough 1, which is adapted to be utilized in connection with anyordinary and well-known furnace to convey the molten metal from thefurnace to the molds, is formed of metal, preferably iron, and isprovided with enlargements 2, having vertical recesses 3, which formslideways for a skimming-barrier 4. The skimming-barrier has eyebolts 5or similar devices to afford means for handling the same to remove orreplace it in the slideway during the casting. A second pair ofenlargements 6, having similar slideways 7, is formed in the trough at ashort distance from the first, and a removable dam 8 is supported insaid slideways. This dam Sis also provided with eyebolt-s orsimilardevices 9, a sutficient portion of the top being cut away,substantially as shown at 10 in Figs. 4. and 5, to permit the moltenmetal to flow over it. A similar opening 11 is also formed in the loweredge, the purpose of which will be explained farther on.

In my preferred construction a supplementary metallic trough 12 isarranged in the rear of the dam 8, and its upper end is preferablysupported by the extensions 13, which catch upon the sides of the maintrough. The trough 12 extends from the top of the dam 8 diagonallybackward to the bottom of the main trough and serves to guide the moltenmetal back to the main trough in the rear of the dam as it flows overthe dam. Eyebolts 14 or similar devices are attached to said trough 12to facilitate the removal or replacement.

A portion of the bottom and one side of the main trough is cut away,substantially as shown in Figs. 1, 2, 3, 4, and 7, to form an opening 15to aiford means for the removal of slag, the opening being filled andwalled up with sand during the flowing of the metal. A metallic plate 16is placed beneath this opening, being interposed between the bottom ofthe main trough and the ground,which not only serves to support thesand, but also to protect it from moisture or water.

During the casting the crevices between the main trough, theskimming-barrier, dam, and supplementary trough and between the dam andthe supplementary trough are preferably filled with clay or sand toprevent the entrance of the molten metal. A sufficient amount of 'sandis banked in the rear of the dam 8, substantially as shown at 18 in Fig.3, to prevent the passage of the molten metal beneath said dam, and thelower opening 11 in said, dam is also preferably filled with sand. Sandis also preferably banked at the rear end of the trough 12 at 17. (SeeFigs. 1 and 3.)

Inv the modified form shown in'Fig. 7 the supplementary trough is notused, and in lieu thereof a bank of sand 19 is arranged at the rear ofthe dam 8.

In casting with my improved trough the molten metal flows from thefurnace under the skimming-barrier 4, then over the removable dam andsupplementary trough, and thence to the molds. During the latter portionof the flow, when the metal stops running from the furnace and the levellowers sutficiently to prevent its passage over the dam 8, the bankedsand behind the dam and the supplementary trough are removed to allowthe remainder of the metal collected in front of the'darn to flowthrough the opening 11 in thedam. Finally, when the remainder of themetal has run through said opening in the dam 8 the filling of sand inthe opening 15 is tapped out'and the slag is allowed to run from thetrough through said opening 15.

I claim as my invention- 1. In a metal-casting apparatus, a metallictrough having a front skimming-barrier, a rear dam portion and asupplementarytrough in the rear of the rear dam portion havingextensions at the forward -end resting 011 the side of the main trough.

2. In a metal-casting apparatus, a metallic trough having an opening inits bottom and side filled with sand, a removable skimmingbarrier infront of said opening, a removable dam in the rear of said opening and aremovable guiding means in the rear of the dam for guiding the moltenmetal to the bottom of the trough as it flows over the dam.

3. In a metal-casting apparatus, a metallic trough having an opening inits bottom and side filled with sand, a removable skimmingbarrier infront of said opening, a removable dam in the rear of said openinghaving a top depression and a bottom opening, and a supplementarymetallic trough supported in the main trough with its upper end levelwith the top depression in the dam and extending diagonally backward tothe bottom of the main trough, as set forth. I

4. In a metal-casting apparatus, a metallic trough having an opening inits bottom and side filled with sand, a metallic plate beneath saidopening, a removable skimming-barrier in front of said opening, aremovable dam in the rear of said opening and a removable guiding meansin the rear of the dam for guiding the molten metal to the bottom of thetrough as it flows over the dam.

5. In a metal-casting apparatus, a metallic trough having askimming-barrier, a dam in the rear of said skimming-barrier having abottom opening and a guiding device mounted in the rear of the dam forguidin g the molten metal to the trough in the rear of the dam as itflows over the dam and arranged to be removed to provide a passage forthe latter portion of the cast as it flows through the bottom opening inthe dam.

6. In a metal-casting apparatus, a metallic trough having an opening inthe bottom and side filled with sand, and a metallic supplementary platebeneath said opening, as set forth.

FRANK E. BACHMAN. Witnesses:

L. M. BILLINGS, G. A. NEUBAUER.

